Radio plug adapter



July 13, 1948. E: L. METTZ RADIO PLUG ADAPTER Filed May. 23. 1947 .5. LMETTZ Patented July 13, 1948 UNITED STATES PATENT OFFICE RADIO PLUG ADAPTER Edgar L. Mettz, Franklin, Tenn. Application May 23, 1947, Serial No. 749,929

(01. 17a sc1) 3 Claims.

This invention relates in general to connectors and more particularly to electrical plugs.

It is a primary object of my invention to provide an electrical connector that will prevent the conductors thereto from being pulled out.

It is another object of my invention to provide an electrical connector having a protector to prevent pulling loose the conductors which frequently causes short circuits and damage to elec-' trical components.

It is another object of my invention to provide an electrical plug having an outer clamp which surrounds the conductor carrying portion to prevent the pulling out of the conductors.

The above and other objects and advantages will become readily apparent when the following specification is read in conjunction with the accompanying drawings in which Figure 1 is a side View of a connector plug embodying my invention.

Figure 2 is a longitudinal cross-sectional view of the connector plug illustrated in Figure 1 without the core, contact pins and conductors.

Figure 3 is a side view of the flexible sleeve utilized to enclose the conductors in the connector illustrated in Figure 1.

Figure 4 is a front View of the clamp member utilized in the device illustrated in Figure 1.

Referring to Figures 1 and 3 it is seen that the reference numeral Iii refers to a flexible tubing having a flared end I i. The flared end H is proportioned to be fitted over a conical shaped core I 2 formed of insulating material and having a hollowed-out portion i3. A thin insulating wafer I4 is provided with a plurality of male pins iii. The ends of conductors Iii are fastened to the interior of the pins H5 in the usual manner by soldering or other suitable means.

In order to hold the wafer M tightly against the end face or the core l'2 there is provided a metal clamp II. The metal clamp H is of crown-like configuration and comprises a base 18 which may be split at iii to permit ease in fitting the clamp over the core l2. Extending upwardly and outwardly from the base iii are a plurality of prongs 20' each having a bentover portion 2! at the outer extremity thereof for pressing tightly the wafer. 14 against the core I2. The lower portion 18 of the clamp ll is made of conical shape to fit the lower portion of the core l'2 over which the flared portion ll of the flexible tube It is placed.

In assembly, the conductors it are drawn through the flexible tube Ill and the core [2. The bared ends of the conductors are then soldered into the hollow pins l5 in the usual manner. The flared portion H of the flexible tube It] is then fitted over the small end of the core [2. Base [8 of the clamp H is placed on the flare II and pushed up so that the prongs 20 extend the full length-of the core l2 and the bent-over portions 2! are pressed against the wafer 14 as illustrated in Figure 1.

My connector may be advantageously used in radio equipment for such purposes as a loudspeaker connector or as a battery plug for those radio sets utilizing dry batteries.

In removing the plug or connector it is necessary only to grasp the flexible tube l0 and pull. Such action places no strain upon the conductors It and there is thus no danger of the conductors being pulled loose and causing a short circuit.

Changes and modifications may be made in the device without departing from the spirit of the invention. Having thus described my invention, what is claimed is:

1. An electrical connector comprising a hollow core, a flexible tube having one end flared to fit over one end of said core, a wafer having a plurality of contact pins, said wafer adapted to be held against the other end of said core, a clamp having one end shaped to grip and press the flared end of the flexible tube, prongs on said clamp, and bent over portions on the end of each 1 of said prongs for clamping said wafer against said core.

2. An electrical connector comprising a hollow tapered core, a flexible tube having a flared end adapted to fit over the small end of said tap red core, a wafer of insulating material having a plurality of contact pins thereon, said wafer adapted to be positioned'against the other end of said core, a clamp of crown-like configuration, elongated prongs on said clamp, said clamp adapted to encircle and grip the flared portion of said flexible tube, said prongs being positioned to overlay said core, and a bent-over portion on the end of each of said prongs for gripping said wafer.

3. An electrical connector comprising a hollow tapered core of insulating material, a flexible tube having a flared end to fit over the small end of said tapered core, a wafer of insulating material, a plurality of contact pins mounted on said wafer, a clamp having a base adapted to encircle and tightly grip the flared portion of the flexible tub-e, said clamp being of crown-like configuration and having a plurality of prongs extending from the base adapted to overlay the outside of said core,

and means on the end of each of said prongs for UNITED STATES PATENTS pressing said wafer against said core.

' EDGAR L. ME'I'IZ. Number Name Date 1,350,470 Schmidt Aug. 24, 1920 REFERENCES CITED 5 1,829,692 Walker Oct. 27, 1931 The following references are of record in the 2 55 533 file of this patent: 

